Edward andrew lougiiry and james loughry



(No Model.)

E. A. & J. LOUGHRY. WATER GAGE.

Patented June 9, 1891.

m ,A i.

,MAF v INVENT RS.'

Md; au.

' f f ATTOHNEYS IIC W/TNESSES i dd/@a NITE STATES PATENT OFFICE.

EDlVARD ANDREV LOUGIIRY AND JAMES LOUGHRY, OE REDFERN, NEAR SYDNEY, NET SOUTH 'WALEIH ,WATER-GAGE.

SPECIFICATION forming part of Letters Patent No. 453,814, dated June 9, 1891.

Application filed Uetoher 13, 1890. Serial No. 363,038. (No model.)

To @ZZ whom t may concern:

Be it known that we, EDWARD ANDREW LOUGHRY and JAMES LoUGHRv, engineers, both subjects of the Queen of Great Britain, residing at Redfern,near Sydney, in the British Colony of New South lllales, have invented new and useful Improvements in Equi-- librium-Pressure Taps, Cocks, or Faucets, of which the following is a specification.

This invention relates to equilibrium-pressure taps, cocks, or faucets-that is, to taps, cocks, or faucets which are used in positions where pressure is equal or nearly equal at the supply and discharge ends when they are in open position-and it has been devised specially so that a tap, cock, or faucet of such description will automatically cut oif or close the source of pressure should the pressure at the discharge or off end be relieved. By this invention a tap, cock, or faucet may be produced especially suitable for use in positions such as between a steam-boiler and its gage-glasses or its steam-gage, and between steanrbeilers and steam-cylinder lubricators, die., where in the event of accident the escape of steam and water from the boiler would he automatically cut olf and the danger of scalding attendants and of other damage be minimized.

These improvements in equilibri11m-pressure taps, cocks, or faucets consist, first and essentially, in the combination, and arrangement in and with the through-passage of the plug of a valve, preferably a ball.-valve, and, secondly, in the particular construction or configuration of the throughpassage of such tap, so as to form a seating for a ball-valve at one end thereof, and prevent a seating for suoli at the other end thereof.

In order that this invention maybe clearly understood, reference will. now be made to the drawings herewith, in which Figure l is a sectional elevation of two equilibrium-pressure taps, cocks, or faucets as applied to the water-gage of a steamboiler; and Fig. 2 is a sectional. elevation of the tap itself.

A is the body or casing of the tap, B the plug, and C the handle.

A is a tapered socket or barrel for plug'.

A2 is a through port or passage, and A3 a narrowed but elongated part thereof.

B is a ball forming a valve.

B2 is a through-passage.

B3 is a bell-mouth or valve-chamber with tapered part forming valve-seat.

B4 is the counter-sunk discharge end.

C C2 C3 mark the various positions taken by the handle C in use.

The other parts of the drawings are those well understood in the construction of watergages for steam-boilers, and forming no part of this invention need no reference.

The plugs B in their normal position have the handles down or in position C when the ball-valves B are also in their normal position. Now when relief of pressure on outside of the tap takes place, occasioned, say, by any sudden rush of steam or water such as occurs when a gage-glass breaks or bursts, the ball-valves B', assuming the positions shown in dotted lines, seated against the tapered part of chamber B3, eut off or prevent the escape of steam and water from the boiler.

To release the ball-valves B from their seats after replacing glass or blowing through, handle C is reversed to position C3 and the plug communicates with boiler through end B4, and, pressure now entering to the gageglass, equilibrium is established and the ballvalve B rolls back into its normal position and the handle reversed back to its normal position C.

In cleaning a gage-glass or in allowing steam to pass through the tap to a drip or waste pipe, the plug B, say, of the top tap of gage-glass mountings, is reversed to position C3 and waste-tap Opened. The passage As being narrowed and elongated prevents the ball-valves B from seating, and thus steam or water freely passes when plug is in reversed position.

IIaving now particularly described and ascertained the nature of our said invention and in what manner the sanne is to be performed, We declare that whatwe claim is In equilibrium taps, cocks, or valves, the combination, with the body or casing A, provided with a through-passage A2, of a, plug B, with its handle C, a Valve-chamber having at one end a Hai-ing month and at the other a ball-Valve, and a dsehargeoree upon which Jhe ball in the plug cannot seat itself, 1o substantially as and for the purpose specified.

EDWARD ANDREW LOUGHRY. JAMES LOUGHRY. Witnesses:

G. S. CHAMPION, N. P. SHUMAN. 

